Noise correlations and SNR in phased-array MRS

NMR in Biomedicine

Volumn 23, Issue 1, 2010, Pages 66-73

  Martini, N ^a,b   Santarelli, M F ^b   Giovannetti, G ^b   Milanesi, M ^b   De Marchi, D ^b   Positano, V ^b   Landini, L ^a,b  

^a UNIVERSITY OF PISA   (Italy)

^b FONDAZIONE TOSCANA GABRIELE MONASTERIO   (Italy)

Author keywords

Magnetic resonance spectroscopy; Noise correlation; Phased array coils; Signal combination; Signal to noise ratio

Indexed keywords

ACQUISITION CHANNELS; COIL DESIGNS; CORRELATED NOISE; DATA COMBINATION; FIELD OF VIEWS; MULTIPLE RECEIVER COILS; NOISE CORRELATION; NOISE DECORRELATION; NOISE VECTORS; NOVEL METHODS; PERFORMANCE EVALUATION; PHASED ARRAY COILS; PHASED ARRAYS; SENSITIVITY IMPROVEMENTS; SIGNAL COMBINATION; SNR GAINS; SNR IMPROVEMENT; WEIGHTING METHODS;

ACOUSTIC NOISE; DATA PROCESSING; MAGNETIC COUPLINGS; MAGNETIC RESONANCE; MAGNETIC RESONANCE SPECTROSCOPY; PARTICLE DETECTORS; PRINCIPAL COMPONENT ANALYSIS; SIGNAL RECEIVERS; WHITE NOISE;

SIGNAL TO NOISE RATIO;

ALGORITHM; ARTICLE; MATHEMATICAL MODEL; MOLECULAR MECHANICS; NOISE; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; PHANTOM; PRINCIPAL COMPONENT ANALYSIS; PRIORITY JOURNAL; PROTON NUCLEAR MAGNETIC RESONANCE; SIGNAL NOISE RATIO;

ALGORITHMS; IMAGE ENHANCEMENT; IMAGE PROCESSING, COMPUTER-ASSISTED; MAGNETIC RESONANCE SPECTROSCOPY; MODELS, THEORETICAL; PRINCIPAL COMPONENT ANALYSIS;

EID: 75149164788     PISSN: 09523480     EISSN: 10991492     Source Type: Journal    
DOI: 10.1002/nbm.1429     Document Type: Article

References (19)

1. Roemer PB, Edelstein WA, Hayes CE, Souza SP, Mueller OM. The NMR phased array. Magn. Reson. Med. 1990; 16: 192-225.
2. Brown MA. Time-domain combination of MR spectroscopy data acquired using phased-array coils. Magn. Reson. Med. 2004; 52: 1207-1213.
3. Prock T, Collins DJ, Dzik-Jurasz ASK, Leach MO. An algorithm for the optimum combination of data from arbitrary magnetic resonance phased array probes. Phys. Med. Biol. 2002; 47: N39-N46.
4. Wright SM, Wald LL. Theory and application of array coils in MR spectroscopy. NMR Biomed. 1997; 10: 394-410.
5. Natt O, Bezkorovaynyy V, Michaelis T, Frahm J. Use of phased array coils for a determination of absolute metabolite concentrations. Magn. Reson. Med. 2005; 53: 3-8.
6. Bydder M, Hamilton G, Yokoo T, Sirlin CB. Optimal phased-array combination for spectroscopy. Magn. Reson. Imaging 2008; 26: 847-850.
7. Dong Z, Peterson B. The rapid and automatic combination of proton MRSI data using multi-channel coils without water suppression. Magn. Reson. Imaging 2007; 25(8): 1148-1154.
8. Maril N, Lenkinski RE. An automated algorithm for combining multi-voxel MRS data acquired with phased-array coils. J. Magn. Reson. Imaging 2005; 21(3): 317-322.
9. Ohliger MA, Sodickson DK. An introduction to coil array design for parallel MRI. NMR Biomed. 2006; 19(3): 300-315.
10. De Zanche N, Massner JA, Leussler C, Pruessmann KP. Modular design of receiver coil arrays. NMR Biomed. 2008; 21: 644-654.
11. Schmitt M, Potthast A, Sosnovik DE, Polimeni JR, Wiggins GC, Triantafyllou C, Wald LL. A 128-channel receive-only cardiac coil for highly accelerated cardiac MRI at 3 Tesla. Magn. Reson. Med. 2008; 59(6): 1431-1439.
12. Martini N, Milanesi M, Giovannetti G, De Marchi D, Positano V, Landini L, Santarelli MF. SNR improvement of MR phased array spectroscopy signals. Proceedings of the 17th Annual Meeting ISMRM, Honolulu, USA, 2009; 4263.
13. Martini N, Santarelli MF, Milanesi M, Giovannetti G, Positano V, Vanello N, Landini L. A Novel Approach To Signal-To-Noise Ratio Improvement of Magnetic Resonance Phased Array Spectroscopy Signals. 19th Int. EURASIP Conf. Biosignal 2008.
14. Martini N, Santarelli MF, Milanesi M, Giovannetti G, Positano V, Vanello N, Landini L. Signal-to-noise ratio improvement of cardiac magnetic resonance spectroscopy signals acquired by phased array coils: A simulation based approach. In Proc. 4th IET Int. Conf. on Advances in Medical, Signal and Information Processing - MEDSIP 2008.
15. Hyvärinen A, Karhunen J, Oja E. Principal Component Analysis, Whitening. In Independent Component Analysis, (eds). Wiley: London, 2001; 125-144.
16. Giovannetti G, Viti V, Positano V, Santarelli MF, Landini L, Benassi A. Magnetostatic simulation for accurate design of low field MRI phased-array coils. Conc. Magn. Res. Part B 2007; 31(3): 140-146.
17. Giovannetti G, Landini L, Santarelli MF, Positano V. A fast and accurate simulator for the design of birdcage coils in MRI. MAGMA 2002; 15(1-3): 36-44.
18. King SB, Varosi SM, Duensing GR. Eigenmode analysis for understanding phased array coils and their limits. Concepts Magn. Reson. 2004; 29(1): 42-49.
19. Sandgren N, Stoica P, Frigo FJ, Selén Y. Spectral analysis of multichannel MRS data. J. Magn. Reson. 2005; 175(1): 79-91.